The DLC156 is an innovative, six channel TDM multiplexer for transporting uncompressed and compressed video over dark fiber or managed optical networks such as ROADM and OTN. Users can mix and match SD-SDI, ASI, HD-SDI, or 3G-SDI services into a single 10.7 Gb/s optical transport stream.

The DLC156 TDM Multiplexer for the DigiLink chassis is a space efficient, cost-effective module for transporting up to six HD-SDI or three 3G-SDI digital video services over a single optical wavelength, saving fiber cost and simplifying network design and deployment. Using time division multiplexing (TDM), each channel is assigned a fixed time-slot, eliminating complex configurations. Six independent, mixed format video signals are aggregated to a single wavelength and two time slots can be combined to carry 3G-SDI.

The DLC156 supports links in excess of 80 km using industry standard, hot swappable 10G XFP transceivers in WDM, CWDM, and DWDM wavelengths. Installing a DLC156 repeater between the link source and destination extends the range of a link. Up to 240 uncompressed HD channels are possible over a single fiber.

For additional flexibility, the DLC156 can also be used as a transport aggregator for Artel’s DLC274 four-channel TDM module supporting as many as 960 270 Mb/s video services over a single fiber. With its format flexibility, easy configuration via on-board switches or DL-Manager, and competitive price, the DLC156 is an ideal solution for fiber constrained, multi-service video transport applications.


Ambient operating temperature
0 to 50°C
Ambient storage temperature
-40 to 80°C
Relative humidity
10 to 95% (non-condensing)
Power dissipation
< 21 Watts (DLC156D)
< 15 Watts (DLC156M)


0.8” x 5” x 10.8”
(2 slot in DigiLink chassis)

Optical Interface

Artel Video XFP
See XFP Specifications

Electrical Interface

Signal Formats
2.97 Gb/s – 3G-SDI (SMPTE 424M)
1.483516 Gb/s – HD-SDI (SMPTE 292M)
270 Mb/s – SD-SDI (SMPTE 259M-C, ITU 656)
Signal Polarity
Non inverting
Six channels non 3G-SDI
Three channels of 2.97 Gb/s
Input (DLC156M) Six BNC 75 ohm
Output (DLC156D) Six BNC 75 ohm
Monitor One HD-BNC 75 ohm
Return Loss
>15 dB, 5-1485 MHz
>10 dB, 1486-2967 MHz
Cable Equalization for Belden 1694A type cable
0 to 250 meters (270 Mb/s)
0 to 100 meters (1.483516 Gb/s)
0 to 100 meters (2.97 Gb/s)

Regulatory Conformance

NEBS Level 3, CSA 60950, EN60950,
EN55022 FCC Part 15 (Class A), CISPR 22

Single wavelength optical transport for:

  • Six independent HD-SDI, SDI, or DVB-ASI channels
  • Three independent 3G-SDI channels
  • Combinations of both

Formats supported

  • 2.967 Gb/s 3G-SDI (SMPTE 424M)
  • 1.485 Gb/s HD-SDI (SMPTE 292M)
  • 270 Mb/s
  • SD-SDI (SMPTE 259M-C, ITU 656)
  • SDTI (SMPTE 305M)
  • Other 270 Mb/s, 1.485 Gb/s, and 2.967 Gb/s services

Externally accessible 10.7 Gb/s XFP transceiver optics

  • Optical budget to 24 dB
  • WDM (1310 nm, 1550 nm)
  • CWDM ITU G.694.2
  • DWDM ITU G.694.1

Simple and easy configuration

  • On-board switches
  • DL-Manager

Multiple monitoring options

  • Switch selectable front panel monitor of individual channels (HD-BNC)
  • Front and rear panel status LEDs
  • Loss of video (individual channels)
  • Loss of optical input
  • Laser (XFP) fail

Includes FEC for extended range and improved error performance

Quick Start Guide
Quick Start Guide